But the party has made strong progress in the Tory "Blue Wall" areas it will be targeting at the next general election.

Source: https://www.bbc.co.uk/news/uk-politics-65496724?at_medium=RSS&at_campaign=KARANGA

“In the Blue Wall and across the West Country it is the Liberal Democrats who are the ones who can beat the Conservatives.”

Source: https://www.peeblesshirenews.com/news/national/23671214.lib-dems-demand-end-conservative-circus/?ref=rss

Sucesses in recent local elections, in which they have won control of several councils from the Conservatives, are also indicative of a fightback in the so-called 'Blue Wall' – traditionally Conservative heartland seats in parts of the south of England.

Source: https://www.politicshome.com/news/article/lib-dems-boundary-reviews-election-campaign-target-seats-harrogate-frome

The Blue Wall is mostly (though not exclusively) in the south of England; traditional Tory seats where the Lib Dems think voters want a change.

Source: https://www.bbc.co.uk/news/uk-politics-65190787?at_medium=RSS&at_campaign=KARANGA